Team,
I have a Compact Logic L33R that is having a random network issue.
Starting about a month ago, I had my first issue with this station.
The HMI was in Error states on the indicators, and secondary testing PC stated it could not connect to the PLC.
The RPI that uses Tight VNC to the HMI was still responding to hmi screen changes, so it was still seeing the HMI.
Corrected this issue by power cycling the switches.
2 days later, issue came back, power cycled the switches and it recovered. There were two-4 port 10/100 switches in the cabinet, all I had in MRO was a 12 port gigabit switch, popped it in during their break and everything worked.
2 days later, plc dropped again, RPI stayed connected to HMI, using a singular switch now... removed the switch from my potential issue, noticed the network cable to the PLC was hand made, replaced it with a tailor made and everything came back.
next day, issue returned... unplugged network cable from port one on the PLC and plugged it back in, no change, plugged it into port two and everything returned.
Couple weeks later... Last night at 2 am to be exact, I get the call that its down again. Walked 3rd shift maint through unplugging the port and reconnecting, no resolution, tried switching the port back to port 1, no resolution. Things of note is the link light would start flashing once the network cable was plugged into either port 1 or 2 but the IO light never went solid.
Power cycled station, no resolution, power cycled it a second time and pulled the fuse from the battery back up to drop the plc and then powered it all back up, everything works.
For now, I have the network cable pulled from the wire tray and jumping directing from the switch to the PLC, the developer was not very diligent with separating the high and lower voltage in this cabinet.
I am not completely sold the PLC is the issue, but i'm starting to get to the point of grasping straws.
Any recommendations as to what I should do to isolate the PLC from the equation?
Thanks,
Gad
I have a Compact Logic L33R that is having a random network issue.
Starting about a month ago, I had my first issue with this station.
The HMI was in Error states on the indicators, and secondary testing PC stated it could not connect to the PLC.
The RPI that uses Tight VNC to the HMI was still responding to hmi screen changes, so it was still seeing the HMI.
Corrected this issue by power cycling the switches.
2 days later, issue came back, power cycled the switches and it recovered. There were two-4 port 10/100 switches in the cabinet, all I had in MRO was a 12 port gigabit switch, popped it in during their break and everything worked.
2 days later, plc dropped again, RPI stayed connected to HMI, using a singular switch now... removed the switch from my potential issue, noticed the network cable to the PLC was hand made, replaced it with a tailor made and everything came back.
next day, issue returned... unplugged network cable from port one on the PLC and plugged it back in, no change, plugged it into port two and everything returned.
Couple weeks later... Last night at 2 am to be exact, I get the call that its down again. Walked 3rd shift maint through unplugging the port and reconnecting, no resolution, tried switching the port back to port 1, no resolution. Things of note is the link light would start flashing once the network cable was plugged into either port 1 or 2 but the IO light never went solid.
Power cycled station, no resolution, power cycled it a second time and pulled the fuse from the battery back up to drop the plc and then powered it all back up, everything works.
For now, I have the network cable pulled from the wire tray and jumping directing from the switch to the PLC, the developer was not very diligent with separating the high and lower voltage in this cabinet.
I am not completely sold the PLC is the issue, but i'm starting to get to the point of grasping straws.
Any recommendations as to what I should do to isolate the PLC from the equation?
Thanks,
Gad